(
课件网) Unit 3 Language in use Module 8 Accidents -- -- 学 习 目 标 复习巩固本模块的词汇和句型； 过去进行时与when和while引导的时间状语从句连用。 1 提升学生预防事故的能力和在事故中自救的能力，培养学生济困救险的品德。 2 While the lights were changing to red, a car suddenly appeared round the corner. When Henry was trying to find the snake, his hand began to hurt badly. I was trying to pick it up when it bit me again. 课 堂 导 入 Language practice 过去进行时与when和while引导的时间状语连用 过去进行时常和when, while 引导的时间状语连用，构成复合句。 My mother was cooking when I got home. 我母亲正在做饭，这时我到了家。 My father was watching TV while my mother was doing cleaning. （那时）我父亲在看电视，我母亲在清扫卫生 课 堂 学 习 一、when与while的区别 在when引导的时间状语从句中，谓语动词可以是延续性动词，也可以是非延续性动词。而在while引导的时间状语从句中，谓语动词必须是延续性动词。 We were talking when the teacher came in. 我们正在交谈，这时老师进来了。 They arrived when/while we were having dinner. 当我们正在吃晚饭时，他们到了。 二、 when引导的时间状语从句与主句的时态 I was walking in the street when the accident happened. 我正在街上散步，这时这起交通事故发生了。 The accident happened when I was walking in the street. 当我正在街上散步时，这起事故发生了。 [总结] 能够延续的动词用过去进行时，不能延续的动词用一般过去时。 主句 when从句 过去进行时 一般过去时 一般过去时 过去进行时 三、 while 引导的时间状语从句与主句的时态 I saw the accident while I was walking on the road. 当我正在街上散步时，我看见了这起交通事故。 My mother was watching TV while my father was reading newspapers. 我母亲在电视，我父亲在读报纸。 [总结] 当强调两个动作同时进行时，主句和while从句都用过去进行时。 主句 while从句 一般过去时 过去进行时 过去进行时 过去进行时 三、归纳 如果主句和从句都用了过去进行时，那么从句用while引导；如果从句是一般过去时，要用when引导；如果主句是一般过去时，从句是过去进行时，从句可用when或while引导。 1 Complete the sentences with when or while. 1 He was listening to music he was riding his bike. 2 I was waiting at the lights I saw the boy fall off his bike. 3 I was walking in the street an accident happened. 4 The driver was talking on his mobile phone_____ he was driving. while while when when 2 Look at what Tony did last Saturday. Complete the You column. Time Tony You 8:30am— 1:30am playing in the park visiting my grandparents 12:30pm—1:30pm having lunch with his friends 2:00pm—4:00pm playing football 5:00pm—6:30pm doing homework Now write sentences. Follow the example below. Last Saturday while Tony was playing in the park，I was visiting my grandparents. 5 Complete the news report with the correct form of the words in brackets. Two planes _____(fly) around the airport for a long time this morning because an airport worker was asleep! The planes _____(call) the airport for half an hour. “We were calling and _____(ask) what to do, but no one answered.” In the end, they found that airport worker was ... ...
